31. The room is in a terrible mess; it _______ cleaned.
| A．can’t have been | B．shouldn’t have been |
| C．mustn’t have been | D．wouldn’t have been |
—You look tired.
—Yes. I _____ non-stop until twelve o’clock.
| A．hasn’t been working | B．wasn’t working | C．was working | D．didn’t work |
After that he didn’t feel hungry _____.
A no moreB any moreC no longerD some longer
I hope to give him a valuable birthday present, but I _______ money at present.
A am short ofB went short ofC am short forD went short for
I don’t feel well. I’ll _____ the new medicine.
A lookB tryC makeD give
I’m sorry I _______ your lecture yesterday, but I _____ busy recently.
A missed, have been B miss, am
C had missed, was D have missed, had been